摘要
本文针对节理岩体提出了损伤断裂模型.文中从自一致理论和即时模量概念出发推求岩体等效柔度张量.并将其定义损伤变量,进而从节理的断裂扩展过程对其建立损伤演化方程.最后通过模拟节理岩体的试验成果和某地下洞室实测位移成果对损伤断裂模型进行了验证,并将其应用于我国某高坝复杂地基的稳定分析中。
A damage-fracture mechanics model for jointed rock masses is presented in this paper.Starting from the concepts of the self-consistent principle in solid mechanics and the instantaneous elastic moduli, the equivalent compliance tensor Which is defined as the damage tensor is derived. A damage evolution law which considers the mechanism of crack propagation including frictional sliding,crack kinking,growth of branched tensile cracks, coalescence of microcracks into macrocracks and the ultimate failure of rock masses is proposed and a plastic-brittle constitutive relation which incorporates the coupled brittle strain rate is developed and applied to the stability analysis of a dam foundation in complex rock formation in China.
The damage-fracture mechanics model suggested here has been verified by the results of gypsum model tests and back analysis computation of tunnel excavation.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
1991年第1期43-54,共12页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学资金
